OUTLINE: This is an open-label, dose-escalation, multicenter study. Patients receive interleukin-4(38-37)-PE38KDEL cytotoxin (NBI-3001) intratumorally as a continuous infusion over 4-5 days beginning within 12-36 hours after ventricular catheter placement. Patients then undergo surgical tumor resection approximately 3 weeks after drug infusion. Cohorts of 6 patients receive escalating doses of NBI-3001 until the maximum tolerated dose is determined. Patients are followed within 1 week and then at 8, 16, and 26 weeks.